eJMask
· eJMask is a JVM-based masking library that provides an easy-to-use API for masking sensitive data in your Java applications.
With eJMask, you can quickly mask sensitive information like personal information, credit card numbers, and more.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window ejmask-parent-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.